Turbulence v protoplanetárních akrečních discích: řídící mechanismy a role při tvorbě planet

Kód výsledku v IS VaVaI

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Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Turbulence in protoplanetary accretion disks: driving mechanisms and role in planet formation

Popis výsledku v původním jazyce

Observation tells us that Protoplanetary Disks sustain an accretion flow onto their central objects. This accretion is only possible if angular momentum is transported in the radially outward direction. Such a transport can be explained by an anomalous viscosity that can result from selfgravity and turbulence. We discuss the current understanding of turbulence mechanisms and their limitations. We sketch a model of the turbulent state for the various regions in protoplanetary disks and explain the concept of the dead zone and layered accretion. In regions of the disk where turbulence is present it has a strong influence on the diffusion and transport of dust and chemical species in the disk. Solids can even be efficiently concentrated and trapped in turbulence features, which directly influences the coagulation and growth of dust to Planetesimals.

Název v anglickém jazyce

Turbulence in protoplanetary accretion disks: driving mechanisms and role in planet formation

Popis výsledku anglicky

Observation tells us that Protoplanetary Disks sustain an accretion flow onto their central objects. This accretion is only possible if angular momentum is transported in the radially outward direction. Such a transport can be explained by an anomalous viscosity that can result from selfgravity and turbulence. We discuss the current understanding of turbulence mechanisms and their limitations. We sketch a model of the turbulent state for the various regions in protoplanetary disks and explain the concept of the dead zone and layered accretion. In regions of the disk where turbulence is present it has a strong influence on the diffusion and transport of dust and chemical species in the disk. Solids can even be efficiently concentrated and trapped in turbulence features, which directly influences the coagulation and growth of dust to Planetesimals.

Druh

C - Kapitola v odborné knize

CEP obor

BN - Astronomie a nebeská mechanika, astrofyzika

OECD FORD obor

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Projekt

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Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2006

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název knihy nebo sborníku

Planet formation

ISBN

0521860156

Počet stran výsledku

22

Strana od-do

42-63

Počet stran knihy

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Název nakladatele

Cambridge University Press

Místo vydání

Cambridge

Kód UT WoS kapitoly

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